Apparatus for crushing or recrushing rocks, ores, &amp;c.



M. T. THOMPSON. S POR GRUsHlNG 0R BEGRUSHING ROCKS, GRES, 5w.

APPARATU APPLICATlON HLED DBG. 5. 190?. Y 4

Patented Mar. 16, 1.915.

2 SHEETS-SHEET l.

hem im M. T. THOMPSON. RATUS POR @RUSHING- OR REGRUSHlNG ROCKS, GEES,lfsm.

APPLICATION FILED DEG, 5. 1907.

Patented Mar. 16, 1915.

2 SHEETS-SHEET 2.

www,

@ULM/Lewes 1 .ELTDN T. THGMPSOT, OF MEXICO, MEXICO.

APPARATUS FR CRSHING 0R RECBUSHING ROCKS, GRES, 85o.

Lianne?.

Specication of Letters Patent, Patented Bitti". i6, 1915i Applicationfiled December 5, H3G?.Y Serial No. 65,933.

To all whom a't ma concern Be it known t at I, MILTON T. Tiioiurson, acitizen of the United States, residing at Mexico city, State of Mexico,and Republic of Mexico, have invented certain new and usefulimprovements in Apparatus for Crushing or ltecrushing Rocks, Gres, dac.,of which the following is a specification.

My invention relates to .an apparatus for crushing rock or similarmaterial, and more particularly to such machines comprising a casingwithin which is located a rotary Crusher, the rock being broken andcomminuted by said pressure passing out of the bottom of the Casing andmore particularly my invention relates to a Crusher wherein rotaryfreely swinging hammers are pivotally mounted 'to rotate about a centralshaft but having their axis of rotation radially arranged at a distancetherefrom and whereby a shattering blow is struck the rock before it isbrought beneath the hammers and either so finely broken as to pass outthrough' the lower portion of the apparatus or thrust against thehardened and reinforced walls to be again brought iny Contact with thehammers.

The object of my invention is to provide a machine for this purposewhich will crush or 4coinniinute the rock to 'a degree of neness notreadily attainable with ordinary wcrushers or crushing machinery; andmore particularly to treat material previously crushed in a primaryCrusher, my machine being eminently suitable to be used as a. re-

crusher to any of the large standard makes of rock crushers,-anotherobject attained by my machine being that the rock is acted uponby thehammers almost immediately upon its 'introduction to the casing, thusvobviating excessive wear on themachine.

My invention consists in thearrangement' of parts and details ofconstruction herewith described and particularly set forth in theappended claims. v

In the drawings, Figure 1 is a longitudinal section of the crusher, therotating hainmer element, however, being in elevation. Fig. 2 is atransverse section on the line of Fig. i, the hammer heads them selves,however, being in elevation.

Like reference characters v"designate like y parte.

fy crusher comprises agrasing having a gea-eral hopperhke. shape, aninlet opening in and e rotatabie element se i0-,

cated with reference to the inlet opening that the material fallingtherethrough will be caught and thrown against the sides of the casing,the Walls of the casing being provided with hardened anvil plates forthe purpose of breaking the fragments of material hurled against it. Thelowest portion of the casing is provided with a perforated bottomthrough which the coniminuted material passes.

Iii-detail the construction is asfollows': The casing is inade ofordinary sheet steel such as used in the construction of tanks, etc.,and is of any desired thickness. It comprises side walls 1 and endpieces or aprons 15. The side walls 1 are supported by angle irons Awhich in turn vrest upon sleepers A. l

18, 1S are bolts which connect the side walls of the machine to eachother, and 18',

18 are spacing sleeves surrounding the bolts and located between theside walls and holding the saine spaced apart. 1X designates the top ofthe casing which is uninterrupted save for the inlet opening 19hereafter referred to. Attached to the top of the casing by means ofangle irons and bolts, and

cated a series of blocks 11, the same being preferably manganese steelcastings. As I have embodied my invention in the draws ings there arefour of these blocks to each pair of plates 9, said blocks being locatedonfour sides of the octagonal plates.r These blocks are held in Dlace bya pin or rod 11, which passes throiigh all the disks from one side tothe other. This rod may be held inA place by a nut or by a key as I haveshown it. In order to hold the blocks 11 firmly in such position thatthe axis of the blocks projects radially from the center of the shaft 1,I provide the filling or corner pieces 10. `@ne of these iilling piecesis placed on the rear side of the block 1l and is fastened in place bybolts or rivets l0 passing through each pair of plates. .These llingpieces 10 as will be noted from Fig. 1, have their upper edges parallelwith the edges ofthe Between plates 9 and oroiect beyond the same. thusforming shoulders or buiers which protect the corners of the'plates 9and prevent contactbf the rock therewith. At the same time they provideadditional means whereby the plates 9 are properly spaced apart and theblock 11 held in position.

Attached between each two of the blocks 11 is a hammer or breaker 1Q ofcast or forged manganese steel. These hammers hare at their outer ends ahead and at their inner ends are pivoted or loosely hung between eachtwo of the blocks 11 upon a rod or pin 1:7. which passes through all theblocks and is common to all the hammers.

The shaft 10 is supported in bearings 16 and carries a band wheel 2Owhereby it may be driven.

The interior of the casing is lined with plates of chilled steel whichare made so as to be readily removable and replaceable when worn out,the relatively small area of the plates permitting of their easyhandling and also obriating the necessity of throwing away a large platebecause.v of its being worn out in one portion. The particular plate soWorn may be quickly detached and anotherA one replaced. As will be seenin Fig. l, I

preferably line the sides of the casing withv a series of segmentalplates 8 which project inward toward the shaft 16 to aposition withinthe periphery of the plates 9 and project slightly' outward beyondthehammers 12. The rest of the side walls is covered by the plates 6, 6 and7, 7 TheitopI of the entrance end of the casing is covered by the plates5. All of 'these plates are held in position by the tapered,square-sectioned bolts 1T. The heads of these bolts, as will be seen,are square and gradually, taper down to the bolt shank proper whichpro.- jects through the casing walls and .is there provided with a nut.By this means the lates may be drawn securely in position and heldfirmly from any rotative action, and they may be also drawn up tightlyat any time, while at the same time the bolt itself dees not project outbeyond the face of the chilled steel wall. f 3, 3 designate angle ironsbolted tothe side of the walls and carry upon them a plate of sheetsteel this plate in turn supporting at a tangent to the arc ot rotationof the hammers 12, the heavy cast steel platesl 5, 5', which receive theshock of the falling material driven down upon them by the hammers 12..lt will be seen that the casing end '21 does not extend downward to theplate '-1 or to the angle iron 3. and through the opening thus formed inthe inlet end ot' the machine the plate 4 and the heavy face plates 5. 5may be inserted or removed. Inasmuch as these plates have to bear thebrunt of the downwardly driven material and hence are subjeted'to greatWear', they need to be more frequently re' moved and replaced thaneither the'plates 6, T or the top plates 5. It is to be noted Ithat theinclination of the plates, 5 is such as brings them at right angles tothe line taken by a piece of rock falling through the opening 19 andstruck by the hammer 12, the plates being therefore set at a tangent tothe circle described by the hammers.

'2, Q designate angle irons bolted to the side walls which extendbeneath the rotating hammers in the arc of a circle and then upward atan angle slightly less than a tangent to the upper corner of-the casingopposite to the inlet end. The ends `of these angle irons 2 act as stopsfor the plates 5", 5, 1nd they also, as will be seen Jfrom Fig.` Q,support the gratings 13,14. These gratings are preferably made insections and may be easily removed, the sections extending transverselyand filling the space between the angle irons '2. Each grating isprovided with two ribs 13 projecting down'- wardly below the ylevel ofthe upper portion of the angle irons 2 and thus acting to hold thesectional grat/ing in place. The gratings 13 extend upward on thetangentialextension of the angle iron 2 to a point somewhat beyond thearc of rotation of the hammers 12, the remainder of the distance to theupper corner of the machine being covered by a perforated plate 14 ofsheet metal. Inasmuch as the material carried upward by the hammer atwhat may 'be termed the rear of the machine is thrown upward against thetop of the machine, there is no f necessity for making the portion 14:of heavy grating as -is the case with the sections 13. The upwardly tungpieces of roclr strike against the face of the' casing or are carriedover and Hung violently against the facing of the end portions 21'.

19 designates the opening whereby the material is delivered to thehammers, this opening being so located that vthe material isdeliveredinto the path of the hammers themselves,

22 designates the outlet opening of the machine at the lower end of theaprons 15. l5.

In operation, the shaft 16, the plates 9 and the attached hammers 12 arerotated at a peripheral speed of approximately 4,000 feet per minute.This is fthe leastlspeed under which the machine't-'willdo good work.Material is introduced through the opening 19 and at once falls by,gravity into the path described by vthe hammers 12, is struck -by themand dashed violentlyfdown- Ward against the two lower plates 5', 5".From these plates theY material settles by gravity downward toward themiddle of the machine and again comes within the circle described by thehammers and is dragged or ,Y raked over the perforated gratings 13. The

i insana? 8 leventually being carried around bythe sweep o violentlydown upon the plates 5'., to be again,` dragged over the gratings 13.Portions. of stone .which are' broken by being thrownfviolently upwardat a tangent'to the are of rotation of the hammers and against the topof the machine will fall directly downward against the perforated plate14. Material sufficiently bomminuted will pass Y through these platesand the rest will gradually' worlr downward along the plate le and thegratings 13 to beeagain thrownupward lby the hammers, as beforey de`scribed. A

While' have shown whatv I deem to be l the. preferable construction -omy Crusher,

auA

I do not wish to be limited 'to theiexact details shown as the spirit ofmy invention might be embodied in diierent forms without in any waydeparting therefrom.

. The adyantages of my machine are particularly in the means whereby thematerial introduced into thefcrusher -is immediately attacke'ld' andreduced in size before being conveyed to some other portion of theinter'ior, distant'from the point of introduction, thus wear Aand tearon themachine is considerably reduced. 'Another point of advantage liesin the fact thatthe material, thrown from'the hammers, tends vto breakupon itself, since. material or rock carried over bythe uppermosthammersis thrown against ,the descending pieces of rock,

breaking the saine and being. broken and flung with great' orceagainst'the end plates 5 5. Thus Ynot only do the hammers opcrate directlyomthe'material to be treated but also indirectly by means of the mannerin which pieces of roclr are thrown olf from the hammers against eachother and against the plates 5. It will be seen then that there is Ano'grinding-action but a breairiingorA crushing action,y one'A pieceagainstenother or. againt theliardened steel `plates 5', 5';

' Because of -thedact that therapie no actual grindingffgthes'tones,.the sets of hammers may-be rotatedfat ayeryxhighl speed. The

.combination4 of disks, bushings and the the hammers and again thrownhammers is particularly convenient in case 'it is desired to repair orrenew the hammers or any one of the elements of the combination. lhesame may be said with regard to the sectional gratings and the sectionallin- ,ing pieces 5, 6, 7 and 8. Any one of these may be easily renewedwithout removing` the bthers. and thus delays are very largelyminimized. It will alsoibe noted that the tapered bolts do not losetheir grip or enggagement with the plates 5, though the end of the-boltmay be constantly wearing down along Vwith the plate. important as theheads of bolts of the ordinary'character would be soon worn awaywhereupon the plates would fall out of position'or become loose.

1 Having described my invention what I claim is:

1.1m a rock Crusher, a casing having hardened interior walls, an inletopening andan outlet 'grating 5 a shaft passing diametrically throughsaid casing; a series of pairs of spaced plates mounted to rotate withsaid shaft; a series of blocks located between each pair of plates andradiating therefrom and removably attached to said plates; and hammerslocated between each two of said blocks, all of the adjacent hammersbeing pivoted to said blocks by a com- 'mon pin or shaft passing throughall of said blocks and hammers and being movable independently of eachother on said shaft.

2. In a rock orusher, a casing. having This is particularly hardenedinterior walls, an inlet opening and an outlet grating; a shaft'passingdiametrically through said casing; a series of pairs of polyhedralplates mounted to rotate with said shaft; a series of blocks locatedbetween each pair of plates and radiating therefrom andremovablyfattached to said -plates; relativelyhardened boiling cornerpieces attached between each pair of plates and progectmg beyond andprotectingthe 'corners thereof, said pieces being located one on eachSide of each of the projecting blocks; and hammers located between eachtwobf said blocks, all of "the adjacent hammers being pivoted tov saidblocks by a com- .mon pin or shaft passing through each row otsaidblocks and hammers.

los

1n testimony` whereof, I hdve signed-my name to this specification inthepresence of two subscribing* witnesses, v"this twentieth day of November1907. Y l -MILTQN T. THOMPSON. I

,Witnessesz Cantos `MNDEs "CANTRI, "EDnAnoo Yonssms Osanna..

